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Myeloid derived suppressor cells

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https://www.readbyqxmd.com/read/28535011/tumor-growth-limited-to-subcutaneous-site-vs-tumor-growth-in-pulmonary-site-exhibit-differential-effects-on-systemic-immunities
#1
Junko Masuda, Eiji Takayama, Warren Strober, Ayano Satoh, Yuji Morimoto, Yasuko Honjo, Tatsuo Ichinohe, Shin-Ichi Tokuno, Toshiaki Ishizuka, Takahiro Nakata, Akifumi Mizutani, Naoki Umemura, Atsushi Kitani, Ivan J Fuss, Tsukasa Shigehiro, Harumi Kawaki, Masako Mizuno-Kamiya, Nobuo Kondoh, Masaharu Seno
To evaluate systemic immunity associated with tumor growth limited to a subcutaneous site versus growth proceeding at multiple tumor sites, we established syngeneic mouse subcutaneous and pulmonary tumor models by local subcutaneous and intravenous injection of colon carcinoma CT26 cells. We found that splenic myeloid-derived suppressor cell (MDSC) levels were significantly increased in the subcutaneous tumor model but not in the pulmonary tumor model. Furthermore, both CD4+ and CD8+ T cells as well as CD4+ Foxp3+ T cells were significantly decreased in the subcutaneous tumor model and were largely unchanged in the pulmonary tumor model...
May 17, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28534709/mdscs-are-involved-in-the-protumorigenic-potentials-of-gm-csf-in-colitis-associated-cancer
#2
Ning Ma, Qilin Liu, Lin Hou, Yalin Wang, Ziling Liu
Chronic inflammation is thought to be a major driving force for the development of colitis-associated colorectal cancer (CAC). As one member of proinflammatory cytokine family, granulocyte macrophage colony-stimulating factor (GM-CSF) has been identified to play a key role in CAC pathogenesis recently. The underlying mechanisms, however, remain largely unknown. In this study, we found that myeloid-derived suppressor cells (MDSCs) accumulated increasingly in the lesions during the progression from colitis to cancer, which was critical for CAC formation...
May 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/28533469/the-phenotype-and-function-of-myeloid-derived-suppressor-cells-induced-by-porphyromonas-gingivalis-infection
#3
Lingkai Su, Qingan Xu, Ping Zhang, Suzanne M Michalek, Jannet Katz
Porphyromonas gingivalis (Pg), a major etiologic agent of periodontitis, has been reported to induce the expansion of myeloid-derived suppressor cells (MDSC); however, little is known regarding the subpopulations of MDSC expanded by Pg infection. Flow cytometry was used to evaluate bone marrow and spleen cells from mice infected with Pg and controls for surface expression of CD11b, Ly6G and Ly6C. To characterize the phenotype of MDSC subpopulations induced by infection, cells were sorted based on the differential expression of Ly6G and Ly6C...
May 22, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28522585/herpes-simplex-virus-glycoprotein-d-targets-a-specific-dendritic-cell-subset-and-improves-the-performance-of-vaccines-to-human-papillomavirus-associated-tumors
#4
Bruna F M M Porchia, Ana Carolina R Moreno, Rodrigo N Ramos, Mariana O Diniz, Laís Helena T M de Andrade, Daniela S Rosa, José Alexandre M Barbuto, Silvia B Boscardin, Luís Carlos S Ferreira
Cervical cancer is a major public health problem and one of the leading causes of cancer deaths in women. Virtually all cases of cervical cancer, as well as a growing share of anal and head/neck tumors, are associated with human papillomavirus (HPV) infection. Despite the effectiveness, the available prophylactic vaccines do not benefit women with cervical lesions or cancer. Therefore, the search of new immunotherapeutic approaches to treat HPV-induced tumors is still a priority. The present study characterizes a therapeutic antitumor vaccine based on the genetic fusion of the Herpes simplex virus-1 (HSV-1) glycoprotein D (gD) with the E7 oncoprotein from HPV-16 (gDE7)...
May 18, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28512255/immune-consequences-of-penfluridol-treatment-associated-with-inhibition-of-glioblastoma-tumor-growth
#5
Alok Ranjan, Stephen Wright, Sanjay K Srivastava
Glioblastoma is the most common and lethal brain tumor associated with only 12% median survival rate of patients. Despite the development of advanced surgical, radiation or use of combinations of anti-cancer drugs, treatment for glioblastoma patients is still a challenge. The major contributing factor in glioblastoma progression and resistive nature is its ability to evade the immune surveillance. Hence, modulating the immune system in glioblastoma tumors could be an important strategy for anticancer therapeutics...
April 26, 2017: Oncotarget
https://www.readbyqxmd.com/read/28512253/infiltrating-myeloid-cells-exert-pro-tumorigenic-actions-via-neutrophil-elastase
#6
Irina Lerman, Maria de la Luz Garcia-Hernandez, Javier Rangel-Moreno, Luis Chiriboga, Chunliu Pan, Kent L Nastiuk, John J Krolewski, Aritro Sen, Stephen R Hammes
Tissue infiltration and elevated peripheral circulation of granulocytic myeloid-derived cells is associated with poor outcomes in prostate cancer (PCa) and other malignancies. Although myeloid-derived cells have the ability to suppress T-cell function, little is known about the direct impact of these innate cells on prostate tumor growth. Here it is reported that granulocytic myeloid-derived suppressor cells (MDSCs) are the predominant tumor infiltrating cells in PCa xenografts established in athymic nude mice...
May 16, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28507805/generation-and-functional-characterization-of-mdsc-like-cells
#7
Annkristin Heine, Stefanie Andrea Erika Held, Jonas Schulte-Schrepping, Julia Friederike Andrea Wolff, Kathrin Klee, Thomas Ulas, Niklas Arndt Schmacke, Solveig Nora Daecke, Kati Riethausen, Joachim L Schultze, Peter Brossart
Myeloid-derived suppressor cells (MDSC) are critical in regulating immune responses by suppressing antigen presenting cells (APC) and T cells. We previously observed that incubation of peripheral blood monocytes with interleukin (IL)-10 during their differentiation to monocyte-derived dendritic cells (moDCs) results in the generation of an APC population with a CD14(+)HLA-DR(low)phenotype (IL-10-APC) with reduced stimulatory capacity similar to human MDSC. Co-incubation experiments now revealed that the addition of IL-10-APC to moDC caused a reduction of DC-induced T-cell proliferation, of the expression of maturation markers, and of secreted cytokines and chemokines such as TNF-α, IL-6, MIP-1α and Rantes...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28504999/tumor-microenvironment-and-checkpoint-molecules-in-primary-cutaneous-diffuse-large-b-cell-lymphoma-new-therapeutic-targets
#8
Christina Mitteldorf, Arbeneshe Berisha, Monique C Pfaltz, Sigrid M C Broekaert, Michael P Schön, Katrin Kerl, Werner Kempf
Programmed death ligand 1 (PD-L1) is expressed by 20% to 57% of systemic diffuse large B cell lymphomas (DLBCLs). PD-L1 expression in primary cutaneous DLBCL (pcDLBCL) has not been studied so far. Sixteen paraffin-embedded tissue samples of pcDLBCL (13 leg type [LT], 3 others [OT]) were investigated for PD-1, PD-L1, and CD33 expression and the cellular composition of the tumor microenvironment, focusing on myeloid-derived suppressor cells (MDSCs) and tumor-associated macrophages. Membrane-bound PD-L1 expression by the tumor cells was observed in all samples, albeit to a variable extent (19...
May 12, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28503409/taming-immune-suppressor-application-of-myeloid-derived-suppressor-cells-in-anti-cancer-gene-therapy
#9
Bhagelu R Achyut, Ali S Arbab
No abstract text is available yet for this article.
February 2017: Translational Cancer Research
https://www.readbyqxmd.com/read/28501940/common-extracellular-matrix-regulation-of-myeloid-cell-activity-in-the-bone-marrow-and-tumor-microenvironments
#10
REVIEW
Sabina Sangaletti, Claudia Chiodoni, Claudio Tripodo, Mario P Colombo
The complex interaction between cells undergoing transformation and the various stromal and immunological cell components of the tumor microenvironment (TME) crucially influences cancer progression and diversification, as well as endowing clinical and prognostic significance. The immunosuppression characterizing the TME depends on the recruitment and activation of different cell types including regulatory T cells, myeloid-derived suppressor cells, and tumor-associated macrophages. Less considered is the non-cellular component of the TME...
May 13, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28501913/chronic-myeloid-leukemia-immunobiology-and-novel-immunotherapeutic-approaches
#11
Emilie Cayssials, Francois Guilhot
Imatinib has revolutionized the treatment and prognosis of chronic myeloid leukemia (CML) with survival rates now approaching those of the age-matched healthy population. To be able to discontinue tyrosine kinase inhibitor (TKI) treatment, it is necessary to develop complementary therapies to target minimal residual disease. Recent findings by a number of investigators in both CML mouse models and CML patients offer evidence that many factors in the leukemic microenvironment can collectively contribute to immune escape, including expansion of myeloid-derived suppressor cells, programmed death-1/programmed death-1 ligand interactions resulting in T-cell impairment, expression of soluble suppressive factors such as soluble CD25, and down-regulation of MHC molecules by CML cells...
May 13, 2017: BioDrugs: Clinical Immunotherapeutics, Biopharmaceuticals and Gene Therapy
https://www.readbyqxmd.com/read/28499784/gsk-3-as-a-novel-prognostic-indicator-in-leukemia
#12
REVIEW
Peter P Ruvolo
While leukemias represent a diverse set of diseases with malignant cells derived from myeloid or lymphoid origin, a common feature is the dysregulation of signal transduction pathways that influence leukemogeneisis, promote drug resistance, and favor leukemia stem cells. Mutations in PI3K, PTEN, RAS, or other upstream regulators can activate the AKT kinase which has central roles in supporting cell proliferation and survival. A major target of AKT is Glycogen Synthase Kinase 3 (GSK3). GSK3 has two isoforms (alpha and beta) that were studied as regulators of metabolism but emerged as central players in cancer in the early 1990s...
May 8, 2017: Advances in Biological Regulation
https://www.readbyqxmd.com/read/28498847/paradoxical-myeloid-derived-suppressor-cell-reduction-in-the-bone-marrow-of-siv-chronically-infected-macaques
#13
Yongjun Sui, Blake Frey, Yichuan Wang, Rolf Billeskov, Shweta Kulkarni, Katherine McKinnon, Tracy Rourke, Linda Fritts, Christopher J Miller, Jay A Berzofsky
Myeloid derived suppressor cells (MDSCs), which suppress anti-tumor or anti-viral immune responses, are expanded in the peripheral blood and tissues of patients/animals with cancer or viral infectious diseases. We here show that in chronic SIV infection of Indian rhesus macaques, the frequency of MDSCs in the bone marrow (BM) was paradoxically and unexpectedly decreased, but increased in peripheral blood. Reduction of BM MDSCs was found in both CD14+MDSC and Lin-CD15+MDSC subsets. The reduction of MDSCs correlated with high plasma viral loads and low CD4+ T cell counts, suggesting that depletion of BM MDSCs was associated with SIV/AIDS disease progression...
May 12, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28493377/neonatal-myeloid-derived-suppressor-cells-show-reduced-apoptosis-and-immunosuppressive-activity-upon-infection-with-escherichia-coli
#14
Anja Leiber, Julian Schwarz, Natascha Köstlin, Bärbel Spring, Birgit Fehrenbach, Nenad Katava, Christian F Poets, Christian Gille
BACKGROUND: Susceptibility to infection during the neonatal period and reduced control of inflammation in neonates are attributed to immunosuppression persisting from fetal life. Myeloid-derived suppressor cells (MDSCs) are immature myeloid progenitors with suppressive activity and increased numbers in cord blood. We hypothesized that MDSCs contribute to innate host defence in neonates, paralleled by anti-inflammatory signalling. METHODS: Phagocytic activity, infection induced apoptosis, expression of B-cell lymphoma (Bcl)-2 family proteins, production of reactive oxygen species (ROS), cytokine production and T-cell suppression of neonatal granulocytic-MDSCs (G-MDSCs) after infection with Escherichia coli (E...
May 11, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28492541/glycolysis-regulates-the-expansion-of-myeloid-derived-suppressor-cells-in-tumor-bearing-hosts-through-prevention-of-ros-mediated-apoptosis
#15
Shiou-Ling Jian, Wei-Wei Chen, Yu-Chia Su, Yu-Wen Su, Tsung-Hsien Chuang, Shu-Ching Hsu, Li-Rung Huang
Immunotherapy aiming to rescue or boost antitumor immunity is an emerging strategy for treatment of cancers. The efficacy of immunotherapy is strongly controlled by the immunological milieu of cancer patients. Myeloid-derived suppressor cells (MDSCs) are heterogeneous immature myeloid cell populations with immunosuppressive functions accumulating in individuals during tumor progression. The signaling mechanisms of MDSC activation have been well studied. However, there is little known about the metabolic status of MDSCs and the physiological role of their metabolic reprogramming...
May 11, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28492521/coinjection-of-il2-dna-enhances-e7-specific-antitumor-immunity-elicited-by-intravaginal-therapeutic-hpv-dna-vaccination-with-electroporation
#16
Y Sun, S Peng, A Yang, E Farmer, T-C Wu, Chien-Fu Hung
The generation and use of therapeutic human papillomavirus (HPV) DNA vaccines represent an appealing treatment method against HPV-associated cervical cancer due to their safety and durability. Previously, we created a therapeutic HPV DNA vaccine candidate by linking the HPV16-E7 DNA sequence to calreticulin (CRT/E7), which we showed could generate significant E7-specific cytotoxic T lymphocyte (CTL)-mediated anti-tumor immune responses against HPV16 oncogenes expressing murine tumor model TC-1. Here we assess the therapeutic efficacy of intravaginal immunization with pcDNA3-CRT/E7 followed by electroporation...
May 11, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28489607/trans-scirpusin-a-showed-antitumor-effects-via-autophagy-activation-and-apoptosis-induction-of-colorectal-cancer-cells
#17
Eun-Hye Hong, Eun-Young Heo, Jae-Hyoung Song, Bo-Eun Kwon, Jae-Young Lee, Yaejeong Park, Jinwoong Kim, Sun-Young Chang, Young-Won Chin, Sang-Min Jeon, Hyun-Jeong Ko
Trans-Scirpusin A (TSA) is a resveratrol oligomer found in Borassus flabellifer L. We found that TSA inhibited the growth of colorectal cancer Her2/CT26 cells in vivo in mice. Although some cytotoxic T lymphocytes (CTLs) were induced against the tumor-associated antigen Her2, TSA treatment did not significantly increase the level of Her2-specific CTL response compared to that with vehicle treatment. However, there was a significant increase in the level of TNF-α mRNA in tumor tissue and Her2-specific Ab (antibody) production...
April 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28487978/enhanced-circulating-ilc2s-and-mdscs-may-contribute-to-ensure-maintenance-of-th2-predominant-in-patients-with-lung-cancer
#18
Yumin Wu, Yulan Yan, Zhaoliang Su, Qingli Bie, Xiaobo Chen, Prince Amoah Barnie, Qi Guo, Shengjun Wang, Huaxi Xu
Group 2 innate lymphoid cells (ILC2s) were demonstrated to be involved in the initiation and coordination of type 2 T helper cell (Th2) responses. Myeloid‑derived suppressor cells (MDSCs) have received a great deal of attention for their role in creating an immunosuppressive microenvironment in cancer‑bearing hosts. However, the contributions of ILC2s in the occurrence and development of lung cancer, and the association between ILC2s and Th2 or MDSCs in lung cancer remain to be elucidated. In the present study, 36 patients newly diagnosed with lung cancer based on the guidelines of the International Union Against Cancer Tumor Node Metastasis were included...
June 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28484727/estrogens-drive-myeloid-derived-suppressor-cell-accumulation
#19
EDITORIAL
Jose R Conejo-Garcia, Kyle K Payne, Nikolaos Svoronos
No abstract text is available yet for this article.
January 2017: Oncoscience
https://www.readbyqxmd.com/read/28484463/immune-effector-recovery-in-chronic-myeloid-leukemia-and-treatment-free-remission
#20
REVIEW
Amy Hughes, Agnes S M Yong
Chronic myeloid leukemia (CML) is a hematological cancer, characterized by a reciprocal chromosomal translocation between chromosomes 9 and 22 [t(9;22)], producing the Bcr-Abl oncogene. Tyrosine kinase inhibitors (TKIs) represent the standard of care for CML patients and exert a dual mode of action: direct oncokinase inhibition and restoration of effector-mediated immune surveillance, which is rendered dysfunctional in CML patients at diagnosis, prior to TKI therapy. TKIs such as imatinib, and more potent second-generation nilotinib and dasatinib induce a high rate of deep molecular response (DMR, BCR-ABL1 ≤ 0...
2017: Frontiers in Immunology
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